Equilateral
They are angles as for example an angle of 90 degrees is 1/4 of a full turn of 360 degrees
A pentagon is a 5 sided polygon whose interior angles add up to 540 degrees
Congruent angles have the same measure. congruent Kenpachi54 improve answer: Actually, angles don't have to be congruent just to have the same angle measurements A has a right angle is 90 degrees. even if there is a small right angle and a large right angle you know they are both 90 degrees because ALL right angles are 90 degrees, so there is really no name for it.
right angles or 90 degrees
If 2 of its interior each measure 30 degrees then it is an isosceles triangle
Congruent angles are angles that have the same measure. For example, if angle A measures 30 degrees and angle B also measures 30 degrees, then angles A and B are congruent. Additionally, angles that are vertically opposite when two lines intersect are also congruent. In general, any angles that are equal in measurement are considered congruent.
Supplementary Angles
Complementary angles
Less than 90 degrees: Acute More than 90 but less than 180: Obtuse More than 180: Reflex Special cases. 90 degrees: Right angle 180 degrees: Line In degrees. Use a protractor to measure angles correctly and accurately.
If each of the 3 interior angles measure 60 degrees then it is an equilateral triangle.
right angles
An angle whose degree measure is greater than 90 but less than 180 is simply in that range. Examples would be 91 degrees, 104.5 degrees, 179.25 degrees, and so on. There is no specific name for angles in this category, but it falls into the broader category of obtuse angles, angles with measures greater than 90.